Containing simple and labor-saving method of obtaining Prismoidal Contents directly from End Areas. Illustrated by Examples, and accompanied by Plain Rules for Practical Uses. Illustrated. 8vo, cloth 1 50

HUNTER, Capt. R. F.—Manual for Quartermasters and Commissaries.

Containing Instructions in the Preparation of Vouchers, Abstracts, Returns, etc. 12mo, cloth 1 00

Flexible morocco 1 50

INDUCTION-COILS.—How Made and How Used.

63 illustrations. 16mo, boards. 50

INSTRUCTIONS FOR FIELD ARTILLERY.

Prepared by a Board of Artillery Officers. To which is added the "Evolutions of Batteries." Translated from the French by Brig.-Gen. R. Anderson, U. S. A. 122 plates. 12mo, cloth 1 00

ISHERWOOD, B. F.—Engineering Precedents for Steam Machinery.

Arranged in the most practical and useful manner for Engineers. With illustrations. Two volumes in one. 8vo, cloth 2 50